Merck Manual

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Leptospira interrogans , microscopic agglutination
Leptospira interrogans , microscopic agglutination

Leptospira interrogans, microscopic agglutination test, dark-field microscopy, low power. The characteristic hooked ends ("question marks" or "interrogation points") that give the species its name are visible in nonagglutinated bacteria.

Courtesy of the Department of Pathobiology, University of Guelph.

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